Android: how to write files to removable external storage?

Question

Android

Good afternoon!
My device has two external storage mounted: internal memory (as primary external storage) and a removable memory card (as secondary external storage).
How do I programmatically write files to a removable card (secondary external storage) if I have axis version 4.0.3 (API 15)?
ps Environment.getExternalStorageDirectory() returns primary external storage (in my case it is internal emulated storage)

Answer 1

public class StorageUtils {
public static class StorageInfo {
public final String path;
public final boolean readonly;
public final boolean removable;
public final int number;
StorageInfo(String path, boolean readonly, boolean removable, int number) {
this.path = path;
this.readonly = readonly;
this.removable = removable;
this number = number;
}
public String getDisplayName() {
StringBuilder res = new StringBuilder();
if (!removable) {
res.append("Internal SD card");
} else if (number > 1) {
res.append("SD card " + number);
} else {
res.append("SD card");
}
if (readonly) {
res.append(" (Read only)");
}
return res.toString();
}
}
public static List getStorageList() {
List list = new ArrayList();
String defaultPath = Environment.getExternalStorageDirectory().getPath();
boolean defaultPathRemovable = Environment.isExternalStorageRemovable();
String defaultPathState = Environment.getExternalStorageState();
boolean defaultPathAvailable = defaultPathState.equals(Environment.MEDIA_MOUNTED) || defaultPathState.equals(Environment.MEDIA_MOUNTED_READ_ONLY);
boolean defaultPathReadonly = Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED_READ_ONLY);
HashSet paths = new HashSet();
int curRemovableNumber = 1;
if (defaultPathAvailable) {
paths.add(defaultPath);
list.add(0, new StorageInfo(defaultPath, defaultPathReadonly, defaultPathRemovable, defaultPathRemovable ? curRemovableNumber++ : -1));
}
BufferedReader reader = null;
try {
reader = new BufferedReader(new FileReader("/proc/mounts"));
string line;
while ((line = reader.readLine()) != null) {
if (line.contains("vfat") || line.contains("/mnt")) {
StringTokenizer tokens = new StringTokenizer(line, " ") ;
String unused = tokens.nextToken(); //device
String mount_point = tokens.nextToken(); //mount point
if (paths.contains(mount_point)) {
continue;
}
unused = tokens.nextToken(); //file system
List flags = Arrays.asList(tokens.nextToken().split(",")); //flags
boolean readonly = flags.
if (line.contains("/dev/block/vold")) {
if (!line.contains("/mnt/secure")
&& !line.contains("/mnt/asec")
&& !line.contains( "/mnt/obb")
&& !line.contains("/dev/mapper")
&& !line.contains("tmpfs")) {
paths.add(mount_point);
list.add(new StorageInfo(mount_point, readonly, true, curRemovableNumber++));
ex.printStackTrace();
} catch (IOException ex) {
ex.printStackTrace();
} finally {
if (reader != null) {
try {
reader.close();
} catch (IOException ex) {}
}
}
return list;
}
}